Subject: Re: Device driver implementation question
To: None <jonathan@DSG.Stanford.EDU>
From: Chris Torek <torek@BSDI.COM>
Date: 01/21/1997 13:20:39
>Were you referring to probing the SBI nexus space for UBAS or probing
>the Unibus I/O register space on the UBA?
The latter -- the 16 SBI nexi tell you what is plugged into them,
if anything. On the 780, though, there is a special Unibus error
register in the adapter, that gets set in some case I never really
>Even with sanely-designed hardware, consoles are a `problem child' for
>the autoconfiguration code ...
Well, no and yes -- consider the Vax, for instance, where the console
is always present and does not need to be configured as a tty -- it is
just there. (If you need to hook it into the rest of the system, e.g.,
to do statistics, you do this much like a pty pseudo-device attach.)